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Dump Valve?

Discussion in 'A3/S3 Forum (8L Chassis)' started by Darkride, Mar 14, 2003.

  1. robthehungrymonkey
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    robthehungrymonkey Member

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    [Jun 11, 2004]
    I've noticed a lot of people seem to have dump valves listed as a mod. What benefits do you get from fitting one? Is it easy to fit? How do you fit it? (I don't even know what one is!).
    And would the recommended option be the AMD Viper dump/diverter valve?

    Any help would be greatly appreciated.
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  3. HTC
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    HTC Active Member

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    [Jun 11, 2004]
    No real benefit really. Most people swap to after market types as the original audi valves fail so often.
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  4. JamesA3
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    JamesA3 Member

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    [Jun 11, 2004]
    for some reason that has never been explained to me your not supposed to use an atmospheric dump valve so go for the recirc type.

    The DV releases the air from the system when you lift off the throttle.
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  5. HTC
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    HTC Active Member

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    [Jun 11, 2004]
    Because the ecu is expecting the release of air back into the system.

    Cue better description than mine! /ubbthreads/images/graemlins/grin.gif
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  6. Add7
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    Add7 Member

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    [Jun 11, 2004]
    IVE NEVER FITTED AN AFTER MARKET ONE, BUT THE OEM DV WENT ON MINE AFTER BUYING IT AFTER 2 WEEKS, AND IT WAS REALLY EASY TO REPLACE. I ALSO BOUGHT NEW JUBILEE CLIPS AS I WANTED TO DOUBLE CHECK NO AIR WAS LEAKING?

    TO BE HONEST I RECKCON AN AFTERMARKET ONE WILL BE EASY TO....IM A NOVICE AND IM GOING TO GIVE IT A GO MATE!

    IF ALL ELSE FAILS, JUST PUT THE OLD ONE BACK ON!

    HOPE THIS HELPS!

    OH BY THE WAY..I HAVE AN A3 NOT S3...BUT I THINK IT WILL BE THE SAME PRINCIPLE.

    IL TAKE A PICTURE AND SHOW YOU WHAT IT LOOK LIKES IF YOU WANT?...BUT AGAIN I DUNNO IF IT WILL BE IN THE SAME PLACE.
    BUT YOU LL GET THE IDEA?
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  7. RichA3Turbo
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    RichA3Turbo ...Watching you! Staff Member Moderator

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    [Jun 11, 2004]
    pretty much there /ubbthreads/images/graemlins/smile.gif

    The ECU has a calculated amount of air that is supposed to be dumped back into the system up-stream. With a vent-to-atmosphere valve on, the amount of air going back into the system (i.e none!) is different to what the ECU is telling itslef, so it all gets a bit screwed up!

    Rich
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  8. JamesA3
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    JamesA3 Member

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    [Jun 11, 2004]
    thus reduced power I take it?
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  9. RichA3Turbo
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    RichA3Turbo ...Watching you! Staff Member Moderator

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    [Jun 11, 2004]
    correct. Plus the disadvantage of more lag, the ECU will chuck out fault codes .etc

    Rich
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  10. robthehungrymonkey
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    robthehungrymonkey Member

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    [Jun 15, 2004]
    Cheers Guys,

    I found a guide on the Forge website wich shows how to fit it, seems pretty simple. Is it worth going for the Forge FMDVS006 or the AMD one?

    I think I will go for one soon. Thanks for the help! /ubbthreads/images/graemlins/beerchug.gif
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  11. Add7
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    Add7 Member

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    [Jun 15, 2004]
    is there a link please robthehungrymonkey? cheers im just being lazy. lol
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  12. robthehungrymonkey
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    robthehungrymonkey Member

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    [Jun 15, 2004]
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  13. Add7
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    Add7 Member

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    [Jun 15, 2004]
    cheers mate
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  14. MarkyB
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    MarkyB Member

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    [Jun 15, 2004]
    How frequently are you supposed to service a Forge DV? Is there a milage / calender interval that you're supposed to stick to? Mines been on for roughly 18 months / 12K miles and I haven't touched it /ubbthreads/images/graemlins/confused.gif

    Car is due in for a 20K mile service & MoT at the dealers on Monday, they'd better not swap the Forge DV for a plastic Bosch one!

    Mark.
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  15. Darkride
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    Darkride New Member

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    [Mar 14, 2003]
    me too /ubbthreads/images/graemlins/biggrin.gif
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